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The definite particle in arabic includes the letters 'alif' and 'laam' at the beginning of the word, so pronounced as 'al'. The purpose is to render the noun on which it is pre-fixed to. Consequantly, ...

Alleles are different versions of a gene. Every person has two alleles for each gene (one from either parent). For example, the gene which determines eye colour can either have an allele ...

A C to C double bond has a high electron density. As the bromine gets close to the C=C bond the high electron density repels the electrons in the H-Br bond further towards the H making the H slightly n...

'Compare and contrast' is the opening to a great many literature questions, from GCSE right through to degree. At A level you'll be expected to not only discern the difference but demonstrate you have ...

An audience is the group of people the writer is addressing. 

There are 3 main purposes for writing: (examples in text messages)

1) To inform: "not coming over tonight....